Home / 742,500.56-1,024,654.92-420,211.28

Finding the Fourth Proportional to 742,500.56, 1,024,654.92 and 420,211.28

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Solution

The fourth proportional to 742,500.56, 1,024,654.92 and 420,211.28 is: 579,893.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,500.56 : 1,024,654.92 = 420,211.28 : x
  2. Step 2: Convert to fraction form
    742,500.56/1,024,654.92 = 420,211.28/x
  3. Step 3: Cross multiply
    742,500.56x = 1,024,654.92 × 420,211.28
  4. Step 4: Simplify right side
    742,500.56x = 430,571,555,491.50
  5. Step 5: Solve for x
    x = 430,571,555,491.50/742,500.56
  6. Step 6: Final answer
    x = 579,893.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.